Telegraphic relay



(No ModeL) F. STITZEL 8v G. WEINEDEL.

TBLEGRAPHIC RELAY.

No. 315,568. A Patented Apr. 14, 1885.

WITNESSES UNITED STATES PATENT EETCE.

TELEGRAPHlC RELAY.

Application filed May 17, 18S-l.

.T0 all whom it may concern:

Be it known that we, FREDERICK STrrzEL and CHARLES VEINED'EL, both citizens of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful vImprovements in Telegraph-Relays, of which the following is a full, clear, and exact description.

In telegraph-relays and other electrical instruments where an electro-magnet and vibrating armature are employed the core or cores of the magnet from constant use oftimes become residually magnetized-that is to say, the core remains a magnet after the electric current has ceased to pass through the coil. This residual magnetism of course attracts the armature, or causes what is termed in telegraphy sticking of the armature. This sticking prevents the correct transmission of messages, if not entirely precluding transmission. A means has been designed for overcoming this difliculty, consisting of an auxiliary spring operated by an additional electric circuit including an electro-magnet; but said spring was not made to act with its additional force until the relay-armature had reached the limit of its movement to the electro-magnet. Consequently the said armature was brought with too much violence against said magnet.

Our invention consists in the combination, with the armature-lever provided with the usual adjustable weight, of an auxilary weight constructed and operating as hereinafter more particularly described and claimed. This auxiliary weight is taken up after the armature has started to or when it is nearing the maximum attractive force of the electro-magnet.

Ve have illustrated in the accompanying sheet of drawings one way of using our invention on a telegraph-relay.

Figure 1 represents a side elevation of the instrument with our invention added. Fig. 2 is a longitudinal sectional detail showing the auxiliary weight-and the means for adjusting it. Fig. 3 is a detail in end elevation of the auxiliary weight and the means for adjusting it ready to be put together.

In the several figures like parts are indicated by similar letters of reference, and the letter a designates any suitable base, upon (No model.)

which are mounted in any suitable manner the electro-magnet b and the posts c, forming the support of the armature-lever d.

Upon one arm of the lever d is the armature c, and on the other an adjustable weight, f.

On the base a, in the Vplane of the end of lever d, is mounted a post, g, having the screwthreaded portion h and the binding-nuts t' and k thereon.

Z is the auxiliary weight having at its top a slotted projection, m, to permit travel of the lever (I before it is time for the weight to act. This weight is also recessed at a about eentrally of its length and vertically, to iit down over and be guided by the upper or screwthreaded end of the post g.

Through the slotted projection m of the auxiliary weight, the hooked end o of the armature-lever d extends.

The operation of our invention is as follows: Suppose the magnets of an ordinary relay are energized by a strong current, then the ordinary weight on the armature is adj usted so as to promptly return the same and overcome all reasonably possible residual magnetism when the circuit is broken. lf, however, the current be weak, the magnets cannot attract the armature, because the weight is too great to be overcome by the current. New, if this weight be divided and properly proportioned, as hereinbefore set forth, the minimum attractive force of the magnet energized by a weak current will attract the armature, notwithstanding the weight j' secured to the lever of said armature, and permit the maximum attractive force of the magnet to overcome the auxiliaryweight. This same auxiliary weight may be adjusted for the strong current.

In our invention the armature is adjusted by the weightf, so that the magnets b energized by a weak current will attract it, and the auxiliary weight Z is adjusted by means of the nuts to allow the lever to lift or take up thel weight after the armature has started for the energized electro-magnet and is near the maximum attractive force of the same. Upon breaking the current in the coil, the auxiliary weight will help the armature to recede from the magnets. This, it will be seen, permits the prompt attracting and retracting movements of the armature (which are essential t0 the proper working of the relay) without IOC) readjustment of weight fand weight Z, since an electro-magnet, energized by a weak current, will near its maximum attractive force exert enough power to raise a weight sufii- `ciently heavy to overcome any residual magnetisni,should said current change from a weak to a strong one.

An arrangement has been patented for use in automatic telegraphs in which a spring' switch is employed, operated by the armature at the receivingstation, when the current is made, to cut out a portion of the working battery. Vhen the circuit is broken in this case, the armature is retracted by a spring, and a spring-switch of the character referred to is usually too feeble to afford any assistance in retracting the armature, its spring being used solely to bring it back into position after the armature is retracted.

/Vhat we claim as new, and desire to secure by Letters Patent, is-

l. The combination, in a relay, ofthe electro-magnet, the pivoted armature-lever d, provided with an adjustable weight, f, and amechanical auxiliary to said weight normally disconnected from the armature -lever and taken up by said armature-lever while it is approaching the energized magnet for use in retracting the same when the circuit is broken, as set forth.

2. The combination, in a relay', ofthe electro-magnet, the pivoted armature-lever d, provided with an adjustable auxiliary weight, Z, normally disconnected from and adapted to be taken up while the armature is approach ing said magnet to assist in retracting the armature, as set forth.

3. The combination, in a relay, of the electro-magnet, the pivoted armature-lever d, having the hooked end o, and provided with the adjustable weight j', the auxiliary weight Z, having the slotted projection m, to engage the said hooked end, and the post g, having the adjustable nuts t' and la thereon, all substaa tially as and for the purpose set forth.

In testimony whereof we have hereunto set our hands this 14th day of May, A. D. 1884.,

FREDERICK STITZEL. CHARLES VEINEDEL. lVi tnesses:

C. LoUIs Kninenn., M. S. SMITH. 

